CO  c  > 


UNIVERSITY  OF  ILLINOIS 


3.15 

8 d  KYLE 


DIRECT  HNS  TO 
COOPERATIVE  CORN 

DDircnrpQ 

■D  .  'k  La.  il—  LJ  S—  i  V  *W# 


' 


.a 


r 

*( 

1 


& - 


U DIVERSITY  OF  ILLINOIS 
. . .  LIBRARY 


B.  P.  I.— 564.  Issued  April  23,  1910. 

United  States  Department  of  Agriculture, 

BUREAU  OF  PLANT  INDUSTRY, 

Corn  Investigations, 

WASHINGTON,  D.  C. 

^DIRECTIONS  TO  COOPERATIVE  CORN  BREEDERS." 


1  FIRST  YEAR’S  WORK. 

0 

f  FOUNDATION  STOCK. 

f  Adaptation. — Seed  should  be  selected  that  has  been  grown  under 

,  conditions  of  soil  and  climate  like  those  in  which  the  crop  is  to  be 
'lanted,  if  such  may  be  found. 

Mixture. — Mixture  in  seed  should  be  avoided  if  possible,  as  it  will 
ely  hinder  progress.  If,  however,  a  choice  must  be  made  between 
native  com  that  is  more  or  less  mixed,  yet  of  long  standing  and 
*  roductive,  and  a  pure  but  radical  introduction  of  unknown  possi¬ 
bilities,  the  preference  should  be  given  to  the  mixed  com. 

The  variety. — With  equal  adaptation  and  purity  the  possibilities 
for  improvement  seem  about  the  same  for  all  varieties. 

SELECT  SEED  IN  FIELD. 

Ear  characters  no  indicator. — So  far  as  known  the  appearance  of 
an  ear,  provided  it  is  sound  and  well  matured,  indicates  nothing  rel¬ 
ative  to  its  producing  power. 

0  These  directions  are  published  for  the  convenience  of  cooperative  corn 
breeders  who  desire  to  follow  this  method.  They  are  necessarily  complicated 
and  should  be  attempted  only  by  those  having  a  deep  interest,  time,  and  a  de¬ 
termination  to  succeed.  The  origination  of  higher  yielding  strains  of  corn  is 
the  work  of  specialists  and  requires  special  methods,  accuracy,  and  good  judg¬ 
ment.  The  method  here  outlined  is  one  of  a  number  of  methods  by  which  the 
Office  of  Corn  Investigations  is  originating  better  yielding  strains  of  corn. 
Only  accurate  trials  for  a  series  of  years  can  decide  which  methods  give  the 
greatest,  most  permanent,  and  most  profitable  results. — C.  P.  Hartley,  Physi¬ 
ologist  in  Charge  of  Com  Investigations. 

33723—10 


2 


DIRECTIONS  TO  COOPERATIVE  CORN  BREEDERS. 


Select  in  the  field . — Seed  should  be  taken  from  only  such  parts 
of  the  field  as  have  an  even  stand  and  about  the  usual  stand  required. 
Ears  should  be  chosen  from  those  plants  that  give  the  heaviest  yields 
as  compared  with  those  neighboring. 

Stalks  that  are  broken  below  the  ear,  diseased,  or  otherwise  unde¬ 
sirable  should  be  avoided. 

Select  early . — Seed  should  be  selected  as  soon  as  mature  without 
waiting  for  it  to  dry  out. 

TREATMENT  AND  STORAGE. 

Drying. — Upon  bringing  seed  from  the  field  it  should  at  once  be 
hung  or  laid  up,  so  that  one  ear  will  not  rest  upon  another,  and 
where  there  is  a  good  circulation  of  air.  Precaution  should  also  be 
taken  that  nothing  damages  the  ears. 

Storing— When  thoroughly  dry  the  seed  should  at  once  be  placed 
in  barrels  or  boxes  that  may  be  closed  tightly.  If  there  are  any  signs 
of  weevils  in  the  corn  or  storage  receptacle  at  this  time,  a  few  table¬ 
spoonfuls  of  carbon  bisulphid  should  be  put  in  a  dish  and  set  upon 
the  corn  and  the  lids  of  the  receptacles  tightly  fitted  for  from 
twenty- four  to  forty-eight  hours.  The  lids  should  then  be  raised 
and  the  poisonous  and  explosive  gas  allowed  to  escape  when  no  fire 
is  present.  For  each  bushel  of  corn  thus  stored  a  pound  of  moth 
balls  or  powdered  naphthalene  should  be  inclosed.  The  lids  should  be 
tightly  closed  at  all  times,  except  when  examining  the  seed  or  work¬ 
ing  with  it. 

Receptacles  for  storing. — Alcohol  barrels  or  kerosene  barrels  that 
have  been  flamed  inside  to  dispose  of  oil  are  very  good  receptacles 
in  which  to  store  seed,  if  they  have  lids  that  can  be  made  to  fit 
tightly. 

Heavy  dry-goods  boxes  may  be  readily  made  into  good  fumigating 
and  storage  boxes  by  fixing  a  tight-fitting  lid,  calking  the  cracks, 
and  protecting  the  corners  and  edges  from  mice  and  rats  with  strips 
of  tin.  A  lining  of  heavy  tar  paper  (such  as  is  used  for  siding  and 
roofing)  may  also  add  to  the  efficiency  of  such  a  box. 

TEST  A  LARGE  NUMBER  OF  SELECTIONS. 

The  grower’s  chances  for  finding  the  exceptionally  valuable  indi¬ 
viduals  are  increased  in  proportion  to  the  number  of  tests  he  makes. 
He  should  test  at  least  50  selections,®  and  100  would  be  much  better. 

SEED  MUST  HAVE  STRONG  VITALITY. 

Only  ears  having  bright  undamaged  kernels  throughout  should 
be  retained. 

°  The  term  “  selection  ”  applies  to  the  seed  from  one  select  plant,  whether  it 
be  one  ear  or  several. 


C'ir.,  Bureau  of  Plant  Industry, 
U.  S.  Dept,  of  Agriculture. 


St. -a 

o*  Osfe  O*  O  jjc 

OH: 

OH: 

0% 

oh 

OH: 

0* 

Osf:  Osf: 

OH: 

OHe 

O* 

Oik 

OHe 

OHe 

ox: 

Oik 

St.-b 

O*  Osjc  Ojj;  Oj{c 

OH: 

OHe 

one 

OH: 

OHe 

OX 

Osjc  Osfc 

OHe 

OX: 

OX: 

ox: 

Oik 

OX: 

OHe 

one 

St.-c 

O*  Osfc  Osfc  Osfc 

OH: 

OH: 

OHe 

oh 

OHe 

0* 

Osf;  Osfc 

OH: 

OHe 

OHe 

OHe 

ox: 

OX: 

oxe 

OHe 

St.-d 

O  sfc  Osfc  Osfc  Osfc 

0* 

OH: 

OHe 

°h 

OHe 

OH: 

Osfc  Osfc 

OHe 

OH: 

OX: 

Oik 

ox: 

OHe 

ox: 

Oek 

St.-e 

Osfe  Osfc  Osfc  Osfc 

Ost: 

OHe 

OH: 

° H 

OH: 

OH: 

Osfc  Osf: 

o* 

0* 

OX: 

ox: 

Oik 

ox: 

ox: 

OHe 

St.— f 

Osfc  Osfc  Osfc  Osfc 

OH: 

OH: 

OHe 

oh 

OH: 

OHe 

Osfc  Osfc 

oh: 

OX: 

OHe 

OHe 

ox: 

Oik 

OHe 

OX: 

St.-g 

Osfc  Osfc  Osfc  Osfc 

OHe 

OH: 

OHe 

oh 

OH: 

OH: 

Osf;  Osjc 

one 

OHe 

OH: 

one 

0=k 

OHe 

OX: 

OHe 

St.-h 

Osfc  Osfc  Osfc  Osfc 

OH: 

OHe 

OHe 

oh 

OH: 

OHe 

Osfc  Osfc 

OH: 

OX: 

one 

0* 

ox: 

OH: 

ox: 

Oik 

St.-i 

Osfc  Osfc  Osf:  Osfc 

OH: 

OH: 

OH: 

oh 

o* 

OH: 

OsjC  Osf; 

OH: 

OX: 

OX: 

Oik 

OHe 

OHe 

OX: 

ox: 

St.-j 

Osfc  Osf:  Osf:  Osfc 

Os|: 

OH: 

°H: 

oh 

°H= 

OH: 

Osfc  Osfc 

OH: 

OX: 

one 

OHe 

Oik 

Oik 

OX: 

oxe 

a  -1 

sfc/  sfc/  sfc  /  sfc/ 

H=  ' 

He/ 

He/ 

H  / 

He/ 

H=/ 

Sfc/ 

He/ 

He/ 

He' 

He/ 

He/ 

H=/ 

H=/ 

He/ 

a  -2 

Sfc/  sfc/  sfc/  sfc/ 

H=/ 

H=/ 

He/ 

He/ 

X/ 

He' 

sfc/  sfc  / 

H=/ 

H=  / 

He/ 

H=/ 

He' 

He/ 

He/ 

He/ 

a  -3 

sfc/  sfc  /  sfc/  sfc/ 

*  ' 

He/ 

He/ 

H/ 

He/ 

He/ 

He 

/  *  / 

He/ 

He/ 

He/ 

He/ 

He' 

He/ 

He/ 

He/ 

a  -4 

sfc/  sfc/  sfc/  sfc/ 

He/ 

He/ 

He' 

He/ 

He/ 

He  ' 

X/  He/ 

He/ 

He' 

He/ 

He/ 

H=/ 

He/ 

He/ 

He/ 

a  -5 

sfc/  sfc/  sfc/  sfc/ 

X/ 

H=/ 

He/ 

*/ 

He/ 

X' 

* 

/  sjc  / 

He/ 

He/ 

H= ' 

He/ 

He/ 

He/ 

He/ 

H=/ 

a  -6 

sfc/  sfc/  sfc  /  sfc  / 

X  / 

*/ 

He/ 

He/ 

He/ 

He/ 

sfe  /  sfc  / 

He/ 

He/ 

He/ 

He' 

*/ 

He/ 

H=/ 

*/ 

a  -7 

sfc'  sfc/  sfc/  sfc/ 

H=/ 

He/ 

He' 

H=/ 

He/ 

He' 

He 

/  sfc/ 

He/ 

He/ 

He/ 

He/ 

H=/ 

He/ 

He/ 

He/ 

a  -8 

Sfc/  sfc/  sfc/  sfc/ 

X' 

X/ 

He/ 

H' 

He/ 

He' 

He 

/  sjc/ 

He/ 

He/ 

H=/ 

He/ 

He/ 

He/ 

H=/ 

*/ 

a  -9 

'  Sfc/  Sfc/ 

He/ 

He/ 

H=/ 

He  / 

He/ 

sfc/  sfc/ 

H=/ 

H=/ 

He/ 

He/ 

He  ' 

He/ 

x«  / 

He/ 

a  -10 

sfc/  sfc/  Sfc/  Sfc/ 

He/ 

He/ 

He/ 

H=/ 

He/ 

He/ 

He 

/  sfc  / 

He' 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

b  -11 

sfc'  sfc/  sfc/  sfc/ 

H=  / 

He/ 

*/ 

H  / 

He/ 

He/ 

*  /  sfc  / 

He' 

X:/ 

He/ 

H=  / 

H=/ 

H=/ 

He/ 

He/ 

b  -12 

sfc/  sfc/  sfc/  sfc/ 

*/ 

He/ 

He/ 

He/ 

He/ 

He' 

sfc  /  sfc/ 

H=/ 

He/ 

He' 

He/ 

H=/ 

He/ 

He/ 

He/ 

b  -13 

sfc/  sfc/  sfc/  sfc/ 

*/ 

He/ 

H=/ 

H=/ 

He/ 

He/ 

sfc  /  sfc/ 

He' 

He/ 

H=/ 

He/ 

H=/ 

He/ 

He/ 

He/ 

b  -14 

sfc/  sfc/  sfc/  sfc  / 

He  / 

He/ 

He  / 

H=/ 

H=/ 

He/ 

sfc  /  *  ' 

He' 

He/ 

He/ 

He/ 

X:/ 

He/ 

He/ 

He/ 

b  -15 

sfc/  sfc/  sfc'  sfc/ 

*/ 

He/ 

He/ 

He/ 

He/ 

He' 

sfc/  sfc  / 

He/ 

He/ 

H=/ 

H=/ 

He/ 

He/ 

He/ 

He/ 

b  -10 

sfc/  sfc/  Sfc/  sfc/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He' 

He 

/  sfc/ 

He/ 

He/ 

He/ 

=k/ 

He/ 

H=/ 

He/ 

He/ 

b  -17 

sfc  /  sfc  /  sfc  /  sfc  / 

He  / 

He  / 

He/ 

He/ 

H=/ 

He/ 

sfc/  sfc/ 

He' 

H=/ 

He/ 

He' 

He/ 

He/ 

He/ 

He/ 

b  -18 

sfc/  sfc/  sfc/  sf:/ 

X/ 

He/ 

He  / 

H  / 

He  / 

He' 

sjc  /  sfc  / 

He' 

X:/ 

He/ 

He/ 

H=/ 

He/ 

H=/ 

He/ 

b  -19 

sfc/  sfc/  Sfc/  Sfc/ 

X  / 

H:  / 

He/ 

H  / 

He/ 

He/ 

sfc/  sfc/ 

He/ 

He/ 

He/ 

He/ 

H=' 

He/ 

He/ 

He/ 

1)  -20 

sfc/  sfc/  sfc/  sfc/ 

He/ 

He/ 

He' 

H:/ 

He  / 

H=/ 

* 

/  sfc/ 

He' 

He/ 

He/ 

He/ 

He' 

X:/ 

He/ 

He  / 

c  -21 

Sfc/  Sfc/  sfc/  sfc/ 

H=  / 

He/ 

H=/ 

He/ 

X' 

He/ 

* 

/  sfc/ 

He' 

He/ 

He/ 

He/ 

He' 

He/ 

He/ 

H=/ 

c  -22 

Sfc  /  sfc  /  sfc  /  sfc  / 

He/ 

He/ 

He/ 

H  / 

He/ 

He/ 

sjc/  sfc/ 

H=/ 

H=/ 

He' 

He/ 

H=/ 

He/ 

He/ 

He/ 

c  -23 

sfc/  sfc/  sjc/  Sfc/ 

He  / 

He/ 

He/ 

H/ 

He/ 

He/ 

sjc/  sfc/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

c  -24 

sfc/  sfc/  sfc  /  sfc/ 

H=  / 

X/ 

*/ 

He/ 

H=/ 

He  ' 

sfc  /  sjc  / 

*/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

o  -25 

Sfc/  sfc/  sfc/  sfc/ 

X' 

He/ 

He/ 

H=/ 

X/ 

X/ 

He 

/  sfc  / 

He/ 

He' 

He/ 

He/ 

He/ 

H=/ 

H=/ 

He' 

c  -20 

sfc  /  sfc  /  sfc  /  sfc  / 

He/ 

H=  / 

He' 

H=/ 

He/ 

sfc/  sfc  / 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

*/ 

He/ 

c  -27 

sfc/  sfc/  sfc/  sfc/ 

He/ 

He/ 

H=  / 

He/ 

He  / 

He/ 

sfc/  sfc  / 

He/ 

He/ 

H=/ 

He/ 

He/ 

He' 

H=/ 

He' 

c  -28 

Sfc/  sfc/  sfc/  sfc/ 

He/ 

He  ' 

He/ 

He/ 

He/ 

H=  ' 

sfc  /  sfc  / 

He/ 

He/ 

He/ 

He/ 

He/ 

*/ 

He/ 

He/ 

c  -29 

sfc  /  sf:/  sfc/  Sfc/ 

H:/ 

He/ 

He/ 

He/ 

X/ 

He/ 

He 

/  sfc  / 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

H=/ 

He' 

c  -30 

Sfc/  */  sfc/  sfc/ 

H:/ 

He/ 

He/ 

H  / 

He/ 

He/ 

*  >  sfc  / 

He/ 

He/ 

H=/ 

He/ 

He/ 

He/ 

He/ 

He/ 

d-31 

Sfc/  Sf:/  sfc/  sf:/ 

X' 

He/ 

He/ 

H=/ 

He/ 

H=/ 

Sfc  /  sfc  / 

He' 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He' 

d  -32 

sfc/  sf:/  sfc/  Sfc/ 

X' 

He/ 

He  / 

He/ 

H=/ 

He/ 

He 

/I  */ 

He' 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He  ' 

d  -33 

sfc/  Sfc/  sfc/  sfc/ 

He/ 

He/ 

He/ 

H=/ 

He/ 

He/ 

H= 

/  sfc  / 

He/ 

He/ 

He/ 

He/ 

He/ 

H=/ 

He/ 

He/ 

d-34 

sfc/  Sf:/  sfc/  sf:/ 

He/ 

He/ 

He/ 

H  ' 

He/ 

He' 

He 

/  sfc  / 

He' 

He/ 

He/ 

He' 

He/ 

He/ 

*/ 

He' 

d  -35 

sfc/  sfc/  sfc/  sfc/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He' 

*  /  sfc/ 

He  ' 

He/ 

He/ 

He' 

He/ 

x=  / 

He/ 

He/ 

d  -36 

sfc/  sf:/  sfc/  sfc/ 

He/ 

He/ 

H=/ 

*/ 

X  ' 

H=/ 

sjc  /  sfc  / 

*  j 

H=/ 

He/ 

*/ 

He' 

He  ' 

He' 

He/ 

X:  ' 

d— 37 

sfc/  sfc/  sf:/  sf:/ 

He/ 

He  / 

He/ 

He/ 

H=  / 

H:/ 

sfc  /  sfc  / 

*/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He  ' 

d-38 

sfc/  sfc/  sfc/  sfc  / 

He  / 

H=/ 

He/ 

He/ 

He/ 

He/ 

sfc  A  sfc  / 

He' 

*/ 

He' 

He/ 

He' 

He' 

He/ 

He/ 

d  -39 

sfc/  sf:/  sf:/  sf:/ 

He/ 

He/ 

He/ 

He/ 

H=/ 

He/ 

sfc  /  sfc/ 

He/ 

He  ' 

He/ 

He/ 

He' 

He/ 

H=/ 

He/ 

d  -40 

sfc/  sfc/  sf:/  Sfc/ 

H=  / 

He/ 

He  / 

H/ 

H=/ 

He/ 

He 

/  sfc  / 

He/ 

He' 

He/ 

He/ 

He' 

He/ 

He/ 

He/ 

e  -41 

sfc/  sfc/  */  sfc/ 

He/ 

He  / 

He/ 

H=/ 

He/ 

He/ 

sfc  /  sfc  / 

He' 

He/ 

He' 

H=/ 

He/ 

*/ 

He/ 

He/ 

e  -42 

sjc/  sfc/  sfc/  sfc/ 

He/ 

He/ 

H=  / 

H/ 

X/ 

He/ 

He 

'  He  ' 

He' 

He/ 

He/ 

He/ 

He/ 

H=/ 

*/ 

He/ 

e  -43 

sfc/  sjc/  sfc/  sfc/ 

H=  / 

He  / 

He/ 

He/ 

*/ 

He/ 

He 

/  He  / 

X:/ 

He/ 

He/ 

He/ 

*  ' 

He/ 

He/ 

He/ 

e  -44 

Sfc/  Sfc/  :fc  /  sfc/ 

He/ 

He/ 

X' 

H  / 

/ 

*  / 

He 

/  He/ 

H=/ 

He/ 

He/ 

He/ 

He' 

He  ' 

He/ 

He/ 

e  -45 

sfc/  sfc/  sfc/  */ 

*/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He 

/  H:  / 

He' 

He/ 

He/ 

He' 

*' 

He' 

He/ 

He/ 

e  -46 

sfc/  sfc/  sf:/  sfc/ 

H=/ 

He/ 

He/ 

H/ 

H=  / 

He/ 

He 

/  He  / 

H=/ 

*/ 

X:/ 

He/ 

He/ 

He/ 

He/ 

He/ 

e  -47 

sfc/  sfc/  sfc/  sfc/ 

He  / 

He/ 

H=/ 

He/ 

He/ 

He/ 

H= 

H=  ' 

H=/ 

He/ 

He/ 

He/ 

He/ 

He  / 

He/ 

He/ 

e  -48 

sfc/  Sfc/  sfc/  sfc  / 

He/ 

H=/ 

He/ 

He/ 

He/ 

H=/ 

He 

/  H= ' 

He/ 

He/ 

He/ 

H=  / 

*' 

He/ 

He/ 

He/ 

e  -49 

sfc/  Sfc/  sfc/  sfc/ 

H=  / 

He/ 

X/ 

He/ 

He/ 

He/ 

X 

/  H=  / 

He' 

He/ 

He/ 

He/ 

He/ 

He ' 

He/ 

He' 

e  -50 

sfc/  sfc/  sjc/  sjc/ 

X/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He 

>  He ' 

He  ' 

He  ' 

He  / 

He/ 

He' 

He  ' 

He/ 

He' 

f  -51 

*/  sfc/  sfc/  sf:/ 

He  / 

He/ 

He/ 

He/ 

*/ 

He/ 

X  • 

'  He ' 

He/ 

He/ 

He  ' 

He/ 

He/ 

He' 

He/ 

He/ 

f  -52 

sfc/  sfc/  sfc/  sfc/ 

He/ 

He' 

He/ 

H/ 

*/ 

He/ 

He. 

'  He  ' 

He' 

He/ 

He' 

He' 

He/ 

He  ' 

He/ 

He/ 

i  -53 

sfc/  sfc/  sfc/  sfc/ 

X  / 

He/ 

H=  / 

H=/ 

He  / 

He/ 

He  ‘ 

'  He  ' 

He/ 

He/ 

He' 

He  / 

He/ 

He' 

He/ 

He' 

f  -54 

sfc/  sf:/  sfc/  Sfc/ 

He/ 

H=/ 

He  / 

H=/ 

He/ 

He/ 

He  - 

'  H=  ' 

He/ 

He/ 

He/ 

He/ 

He  / 

He/ 

He/ 

He' 

f  -55 

sfc/  sfc/  sfc/  sfc/ 

He/ 

H=/ 

He/ 

He/ 

H=  / 

He  / 

He ' 

'  He  / 

He/ 

He/ 

X=/ 

He' 

He' 

He/ 

He/ 

X:/ 

f  -56 

sfc/  sfc/  sfc/  sfc/ 

He/ 

He/ 

He  ' 

He/ 

He/ 

He/ 

He/ 

'  He  / 

He/ 

He/ 

X:/ 

He/ 

He/ 

He/ 

He/ 

He' 

f  -57 

sfc/  sf:/  sfc/  sfc  / 

He/ 

*  / 

He/ 

H=/ 

H=/ 

He  / 

He ' 

'  He  ' 

He' 

He/ 

He' 

He' 

H=  ' 

He  / 

He  ' 

H=  ' 

f  -53 

sfc/  sfc/  sfc/  sfc/ 

He/ 

He/ 

He/ 

H=/ 

H=  / 

He  / 

He  > 

'  H=  / 

*/ 

He/ 

He/ 

*  / 

He' 

H=/ 

H=/ 

He' 

f  -59 

sfc/  Sf:/  sfc/  Sfc/ 

H=/ 

He/ 

He/ 

He/ 

He/ 

He/ 

X' 

'  He/ 

He' 

*/ 

He/ 

He/ 

He/ 

He' 

He  / 

=k  ' 

f  -60 

sfc/  sfc/  sfc/  sfc/ 

H=/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He ' 

'  He/ 

H=/ 

He' 

He/ 

He' 

He  ' 

He/ 

He' 

He/ 

g  -61 

Sjc/  sfc/  sfc/  Sf:/ 

He  / 

He  / 

He/ 

H  / 

X/ 

He/ 

H=  > 

'  He/ 

He' 

He' 

f:/ 

*/ 

He/ 

He/ 

He/ 

He' 

g  -62 

sf:/  sfc/  sfc/  Sfc/ 

He/ 

He/ 

H=/ 

He/ 

X  / 

He/ 

X' 

'  He/ 

He' 

He/ 

He/ 

X:/ 

*  / 

He/ 

*  / 

g  -63 

sjc/  sfc/  sfc/  sf:/ 

H=/ 

H=/ 

He  / 

He/ 

He/ 

He/ 

He  / 

’  He/ 

He/ 

He/ 

He/ 

He/ 

He' 

H=/ 

He/ 

He' 

g  -64 

sfc/  sfc/  Sfc/  sfc  / 

He/ 

He  ' 

He/ 

He/ 

He  / 

He/ 

He' 

'  He/ 

He/ 

He/ 

He/ 

H=/ 

He/ 

He/ 

He/ 

He' 

g  -65 

sf:/  sfc/  sfc/  sfc/ 

X  / 

He  / 

He/ 

He/ 

He  / 

He/ 

He/ 

’  *  / 

He/ 

He/ 

He/ 

*/ 

He' 

He/ 

He/ 

He  ' 

g  -66 

sfc/  sfc/  sfc/  sfc/ 

X  / 

He/ 

He/ 

H=/ 

He ' 

He/ 

He  / 

He' 

He' 

He/ 

H=/ 

He/ 

He/ 

He  ' 

He  / 

*/ 

g  -67 

sfc/  sfc/  sfc/  sfc/ 

He/ 

He  / 

He/ 

*  / 

He/ 

H«/ 

He ' 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

/ 

*  / 

g  -68 

sfc/  sfc/  sfc/  sfc/ 

He/ 

He/ 

He/ 

He/ 

H=/ 

He/ 

He  / 

He' 

He/ 

He/ 

He/ 

*  ' 

*/ 

He/ 

He/ 

He/ 

g  -69 

sfc/  sfc/  Sfc/  sfc/ 

H=/ 

He/ 

H=/ 

He' 

He' 

He/ 

He' 

H=/ 

*/ 

*/ 

He/ 

H=/ 

He/ 

He' 

He/ 

*  / 

g  -70 

sfc/  sfc/  Sfc/  sf:/ 

H:/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He' 

He' 

He/ 

He' 

He/ 

He' 

He  ' 

He/ 

He/ 

He' 

h-71 

sjc/  Sfc/  Sfc/  sfc/ 

He  / 

He/ 

H=/ 

H=/ 

He/ 

*/ 

He  / 

He  / 

H=/ 

He/ 

He/ 

He/ 

He/ 

He' 

He/ 

He' 

h  -72 

sfc/  sjc/  sfc/  sjc/ 

He/ 

He/ 

He/ 

He/ 

He' 

He/ 

He  ' 

He/ 

He/ 

He/ 

He/ 

He' 

He/ 

He/ 

He/ 

He/ 

h  -73 

sfc/  sfc/  sfc/  Sfc/ 

H=  / 

He/ 

He  / 

*  / 

He/ 

He' 

X  / 

He' 

X:/ 

*/ 

*/ 

He' 

He/ 

He/ 

He/ 

He' 

h  -74 

sfc/  sfc/  sfc/  sfc/ 

X/ 

He  / 

He/ 

He/ 

He/ 

He/ 

X' 

He/ 

He' 

He/ 

He/ 

He/ 

He' 

He' 

He/ 

He/ 

h  -75 

sfc/  sfc/  sfc/  sfc/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

X:/ 

He/ 

H=/ 

He/ 

He/ 

h  -76 

sfc/  sfc/  Sfc/  sfc/ 

He/ 

He/ 

He/ 

H  / 

*/ 

He/ 

He/ 

*' 

He' 

He  / 

He' 

He  ' 

He  ' 

He' 

He/ 

He/ 

h  -77 

sfc/  sfc/  */  sfc/ 

He  / 

He  / 

He/ 

He/ 

He/ 

He/ 

H=/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He' 

He/ 

X:/ 

h-78 

sfc/  sfc/  sfc/  SfC  / 

He  / 

He/ 

He  / 

H/ 

H=  / 

He  ' 

He  / 

He' 

He' 

He/ 

He/ 

He/ 

H=/ 

He/ 

He/ 

He' 

h-79 

sfc/  sfc/  sfc/  sfc/ 

X  / 

He  ' 

He/ 

H/ 

He  / 

He/ 

He  / 

H:  ' 

H:' 

He/ 

He/ 

He/ 

He/ 

He' 

He/ 

He/ 

h  -80 

*/  */  */  */ 

*  / 

*  / 

*/ 

*/ 

*  / 

*  / 

*  / 

*  / 

*  / 

*  / 

*/ 

*/ 

*/ 

*  / 

If/ 

*/ 

i  -81 

sfc/  sfc/  sfc/  sfc/ 

He/ 

He  ' 

H=/ 

He/ 

He/ 

He/ 

/ 

*/ 

He  / 

*/ 

H=/ 

He/ 

He' 

He  / 

He/ 

He/ 

i  -82 

sf:  /  sfc/  sfc/  sfc/ 

H=/ 

H=  / 

He/ 

He/ 

H=/ 

He/ 

He  / 

H=  ' 

He' 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

i  -83 

sfc/  Sj:/  sfc/  sf:/ 

He  / 

He/ 

He  / 

H  / 

He' 

He  ' 

He  ' 

He/ 

He' 

He/ 

He  / 

He/ 

He/ 

He  ' 

He' 

He/ 

i  -84 

sfc/  sjc/  sfc/  sfc/ 

k  / 

He  / 

He  / 

H=/ 

He/ 

He  / 

H=/ 

He/ 

He  / 

He/ 

He/ 

He' 

He/ 

He/ 

He/ 

He/ 

i  -85 

sfc/  sjc/  sfc/  sfc/ 

He  / 

He/ 

X' 

He/ 

He' 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He' 

X:/ 

He/ 

He/ 

i  -86 

sfc/  sfc/  sfc/  sfc/ 

He/ 

He  / 

He  / 

He/ 

He/ 

He/ 

He  ' 

He/ 

He/ 

He/ 

*/ 

He/ 

He/ 

H=/ 

*/ 

He/ 

i  -87 

sfc/  sfc/  sfc/  sfc/ 

He/ 

He/ 

He/ 

H=/ 

He/ 

He/ 

He/ 

He/ 

He/ 

*/ 

He/ 

He/ 

He/ 

H=/ 

He/ 

He/ 

i  -88 

sfc/  sfc/  Sfc/  */ 

He/ 

He' 

He/ 

H=/ 

H=/ 

He  / 

He/ 

He' 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

i  -89 

sfc/  sf:/  sfc/  sfc/ 

He/ 

H=/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

k  / 

He/ 

He/ 

He/ 

He/ 

i  -90 

sfc/  sfc/  sfc/  sfc/ 

He/ 

H=/ 

He/ 

H=' 

H<  / 

He/ 

H=  / 

H=/ 

He/ 

He/ 

/ 

*/ 

He/ 

He/ 

*/ 

H=/ 

j  -91 

j  -92 
j  -93 
j  -94 
j  -95 
j  -96 
j  -97 
j  -98 
j  -99 
j-100 

St. -a 

sfc/  Sfc/  sfc/  sfc/ 

H=/ 

He/ 

He/ 

He/ 

He/ 

He/ 

*' 

He/ 

He/ 

He/ 

He/ 

He/ 

H=/ 

He/ 

He/ 

He/ 

sfc/  sfc/  sfc/  sfc/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He  / 

H=/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

sfc/  sfc/  sfc/  sfc/ 

He/ 

He/ 

He/ 

He/ 

H=/ 

He/ 

He/ 

He/ 

He/ 

He' 

He/ 

H=/ 

He/ 

He/ 

He/ 

He/ 

sfc/  Sfc/  Sfc/  Sfc/ 

He/ 

X/ 

H=/ 

X/ 

He/ 

He/ 

He/ 

He/ 

:|e  / 

H<  / 

*/ 

He  / 

He/ 

He/ 

He/ 

He/ 

sfc/  sfc/  sfc/  sfc/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

H=/ 

He/ 

H=/ 

He/ 

He/ 

-X  / 

*/ 

He/ 

He/ 

He/ 

sfc/  sfc/  sfc/  sfc/ 

He/ 

He/ 

He/ 

He/ 

X  / 

He/ 

H:/ 

H=/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

sf:/  sfc/  sfc/  sfc/ 

H=/ 

He/ 

He/ 

H=/ 

He/ 

He/ 

He/ 

He/ 

H=/ 

He/ 

He/ 

*/ 

He/ 

H=/ 

H=/ 

He/ 

sfc/  Sfc/  sfc/  sfc/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He' 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

sfc/  Sfc/  sjc/  sfc/ 

He/ 

H=/ 

He/ 

He/ 

H=/ 

He/ 

H:/ 

He/ 

He/ 

H=/ 

He/ 

He/ 

He/ 

H=/ 

He/ 

He/ 

sfc/  Sjc/  sfc/  sf:/ 

He/ 

H:/ 

He/ 

H=/ 

H=  / 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

H=/ 

He/ 

He' 

Osfc  Osfc  Osfc  Osf: 

a  He 

OH: 

OHe 

OHe 

OH: 

OH: 

OH: 

OH: 

OX: 

OH: 

OHe 

ox: 

OHe 

°He 

OHe 

ox: 

St.-b 

Osfc  Osf:  Osf:  Osfc  < 

a  H= 

OH: 

OH: 

OHe 

0* 

OH: 

°He 

OH: 

OX: 

OX: 

0* 

Oik 

Oik 

Oik 

ox: 

Oik 

St.-c 

Osfc  Osf:  Osf:  Osf: 

a  He 

OHe 

OH: 

OH: 

0* 

0* 

OHe 

OH: 

OX: 

OX: 

OX: 

ox: 

ox: 

ox: 

oxe 

OHe 

St.-d 

Osf:  Osf:  0*  Osfc  c 

a  He  1 

0* 

OH: 

OH: 

OH: 

0* 

OH: 

OHe 

c* 

OX: 

a  He 

Oik 

Oik 

Oik 

OHe 

ox: 

St.-e 

Osfc  Osfc  Osfc  Osfc  Osfc  < 

0* 

OH: 

OH: 

0* 

OHe 

OH: 

OH: 

OX: 

OX: 

one 

Oik 

ox: 

ox: 

Oik 

OHe 

St.-f 

Osfc  Osfc  Osfc  Osfc  Osfc 

0* 

OH: 

OH: 

OHe 

0* 

OH: 

one 

OX: 

OX: 

OX: 

ox: 

ox: 

OHe 

ox: 

OHe 

St.-g 

St.-h 

Osf:  Osf:  Osfc  Osf;  Osfc  < 

OHe 

0* 

OH: 

O* 

OH: 

OH: 

OH: 

OX: 

OX: 

OH: 

ox: 

Oik 

OHe 

Oik 

OHe 

Osfc  Osf:  Osfc  Osfc  Osfc  Osfc  < 

a  He 

OH: 

OH: 

OHe 

0% 

OHe 

OX: 

OX: 

Oik 

0* 

OHe 

OHe 

ox: 

ox: 

St.-i 

Osfc  Osf:  Osfc  Osf:  Osf:  Osfc  < 

a  He 

OHe 

OHe 

OH: 

OH: 

OHe 

OX: 

OHe 

OHe 

Oik 

ox: 

ox: 

ox: 

Oik 

St.-j 

Osfc  Osfc  Osfc  Osf;  Osfc  Osjc  < 

a* 

Ojj: 

0* 

Oj|e 

OH; 

OH: 

°Hc 

OX: 

OHe 

ox: 

OHe 

Oik 

OHe 

OHe 

Fig.  1. 


St.= standard  seed. 

a,  b,  e,  etc. =  substandard  seed. 

St.-a=standard  seed  first  member  of  hill;  substandard  (a),  second  member  of  hill. 

a-l= substandard  seed  (a)  first  member  of  hills  in  row  No.  1;  tested  ear  No.  1,  second  member  in  row  No  1 
°==  standard  plant. 

*=  substandard  plant. 

'= plant  being  tested. 

83723-  10  (To  face  page  3. ) 


OHe 

OHe 

°He 

OHe 

ox: 

ox 

ox 

ox 

ox 

ox 

OHe 

oh: 

0* 

OHe 

ox 

OHe 

ox 

ox 

ox 

ox 

°Xe 

OHe 

ox: 

OHe 

ox: 

ox 

ox 

ox 

ox 

ox 

one 

OHe 

OHe 

OHe 

ox 

Oik 

ox 

ox 

ox 

ox 

OHe 

Oik 

OHe 

one 

Oik 

ox 

ox 

ox 

ox 

ox 

oh: 

Oik 

Oik 

OHe 

ox 

OHe 

ox 

ox 

ox 

ox 

°He 

ox: 

Oik 

ox: 

OHe 

ox 

ox 

ox 

ox 

ox 

°x 

one 

OHe 

one 

ox 

OH: 

ox 

ox 

ox 

ox 

OX: 

OHe 

Oik 

ox: 

OHe 

ox 

ox 

ox 

ox 

ox 

OHe 

OHe 

OHe 

oh: 

ox 

0* 

ox 

ox 

ox 

ox 

OX: 

OHe 

OHe 

oxe 

OHe 

ox 

ox 

ox 

ox 

ox 

OHe 

one 

OHe 

OHe 

ox 

OHe 

ox 

ox 

ox 

ox 

ox: 

OX: 

OHe 

OHe 

He 

ox 

ox 

ox 

ox 

ox 

0* 

OH: 

0* 

oh: 

ox 

oh: 

ox 

ox 

ox 

ox 

°He 

oxe 

OHe 

0* 

ox: 

ox 

ox 

ox 

ox 

ox 

oh: 

Oik 

oh: 

OHe 

ox 

oh: 

ox 

ox 

ox 

ox 

OHe 

OHe 

OHe 

°X: 

ox: 

ox 

ox 

ox 

ox 

ox 

oh: 

°X 

one 

oh: 

ox 

oh: 

ox 

ox 

ox 

ox 

OHe 

oxe 

Oik 

OHe 

oik 

ox 

ox 

ox 

ox 

ox 

Oik 

0* 

oh: 

OHe 

ox 

0* 

ox 

ox 

ox 

ox 

H=/ 

He/ 

He/ 

He/ 

He/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

X/ 

x/ 

X/ 

x/ 

x/ 

He/ 

He/ 

He/ 

He/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He/ 

He/ 

He' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

X/ 

x/ 

X/ 

X' 

x/ 

X/ 

*/ 

x/ 

He/ 

He/ 

He/' 

He/ 

He/ 

x  / 

x/ 

X' 

x/ 

x/ 

X/ 

x/ 

X/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He/ 

He/ 

He/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

*/ 

He/ 

He/ 

He/ 

He/ 

He/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

He/ 

He/ 

H=/ 

He' 

*/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He/ 

He/ 

H=/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

X/ 

*/ 

x/ 

He/ 

He' 

He/ 

He/ 

*/ 

x/ 

X/ 

x/ 

x/ 

x/ 

X  / 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He/ 

He/ 

He/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He/ 

*/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

X  / 

He/ 

X/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He/ 

H=/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

e.  / 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He/ 

He/ 

H=/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

He/ 

H=/ 

H=/ 

He/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

H=/ 

He/ 

H=/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x  / 

X' 

X/ 

x/ 

He/ 

He/ 

He/ 

He/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He' 

He/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X  / 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

He' 

He/ 

He/ 

He/ 

He/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X  / 

x/ 

x/ 

x/ 

X:/ 

He/ 

He/ 

He/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

H=/ 

He/ 

He/ 

X' 

X' 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

He  / 

H=/ 

He/ 

He/ 

He' 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

X' 

X  / 

X' 

X' 

X/ 

X/ 

x/ 

x/ 

x/ 

He/ 

H=/ 

He  ' 

H=/ 

X/ 

x/ 

X/ 

x/ 

X' 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

X/ 

X' 

x/ 

x/ 

x/ 

X:/ 

He/ 

He/ 

He/ 

He/ 

X' 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

X' 

X/ 

x/ 

x/ 

x/ 

He  ' 

He/ 

He/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x  / 

x/ 

x/ 

He/ 

x/ 

X  / 

x/ 

X/ 

X/ 

x/ 

He/ 

He' 

He/ 

He' 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

X/ 

x/ 

x/ 

x/ 

X/ 

x/ 

X/ 

x/ 

x/ 

x/ 

He  / 

He' 

He/ 

He/ 

x/ 

x/ 

x/ 

x  / 

x/ 

X/ 

X/ 

x/ 

x/ 

x/ 

x/ 

X/ 

X  / 

x/ 

x/ 

x/ 

He  ' 

H=/ 

He/ 

He/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He' 

He' 

He/ 

He/ 

He/ 

x/ 

X/ 

x  / 

X/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He' 

He/ 

He/ 

He/ 

x/ 

X/ 

X/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

He/ 

x/ 

x  / 

x/ 

x/ 

x/ 

x/ 

He' 

He/ 

He/ 

He/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

He' 

He/ 

He  / 

*/ 

He/ 

X' 

x/ 

X  / 

x/ 

x/ 

X  / 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He' 

He/ 

H=/ 

H=/ 

He/ 

X/ 

x/ 

x/ 

x/ 

X/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

H=/ 

He/ 

He/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He/ 

He' 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

*/ 

He/ 

He/ 

He/ 

He/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

X' 

x/ 

He  ' 

He' 

He' 

He  / 

X' 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He/ 

He/ 

He/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

X=/ 

He' 

He' 

He/ 

x  / 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

X' 

X' 

X/ 

He/ 

He  ' 

H=/ 

He/ 

x/ 

X' 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

He' 

He' 

He/ 

He/ 

x/ 

X/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He' 

He' 

He/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He' 

He/ 

He/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He' 

He/ 

He/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X  / 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

H=/ 

He/ 

He/ 

He/ 

x/ 

x/ 

x  / 

x/ 

x/ 

X' 

x/ 

x/ 

x-/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He/ 

H=/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

...  / 

x/ 

H=/ 

H=  ' 

*/ 

He/ 

He/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

*/ 

••/ 

He/ 

He/ 

He' 

He' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

X  / 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He' 

He/ 

x/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

He/ 

H=/ 

He' 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X' 

x/ 

X' 

x/ 

x/ 

x/ 

X' 

H=/ 

He/ 

He' 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x  / 

X/ 

x/ 

x/ 

x/ 

X/ 

x/ 

/ 

He/ 

He/ 

H= ' 

H=/ 

X/ 

X' 

x/ 

X' 

x/ 

X' 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

H=/ 

He/ 

H=  / 

He/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

He' 

He/ 

He/ 

*/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x  / 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X  / 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

He' 

He  ' 

He/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x  / 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

H=/ 

He/ 

He  ' 

H=/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x  / 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

H=  ' 

He/ 

He/ 

*/ 

X' 

X' 

X' 

He/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x  / 

x/ 

He' 

He' 

He' 

He  ' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

x/ 

X/ 

X  ' 

x/ 

H=  ' 

He/ 

He' 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

H=/ 

He/ 

He' 

He' 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

He/ 

X' 

x/ 

He/ 

x/ 

x/ 

He' 

He/ 

He/ 

He/ 

x/ 

X  / 

x/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X  / 

x/ 

x/ 

H=/ 

He/ 

He' 

He/ 

x/ 

X  / 

X' 

x/ 

x  / 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X  / 

x/ 

x/ 

x/ 

x/ 

H=/ 

He' 

He/ 

He  ' 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

X/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

H=/ 

He/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

•k  / 

He  ' 

He/ 

H=/ 

x/ 

x/ 

X/ 

X' 

X' 

x/ 

x/ 

x/ 

x/ 

X' 

X/. 

X  / 

x/ 

x/ 

X  / 

x/ 

*/ 

He  ' 

He/ 

He/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

*  / 

He/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

*/ 

He' 

He' 

He' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He  ' 

He/ 

He/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

He' 

He' 

He/ 

He' 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X' 

X/ 

x/ 

x/ 

x/ 

x/ 

H=/ 

He/ 

He/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

H=/ 

He/ 

He/ 

He/ 

x/ 

X/ 

sfc/ 

X  / 

X' 

X  / 

X' 

X' 

X  / 

X/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He/ 

He/ 

x/ 

x/ 

sfc/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He' 

He  ' 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He  / 

He' 

x/ 

X' 

sfc/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

He' 

X:/ 

He/ 

He/ 

x/ 

x/ 

sfc  / 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

x/ 

x/ 

H=/ 

He/ 

He/ 

He' 

x/ 

x/ 

sfc/ 

x/ 

X' 

X/ 

x/ 

X/ 

x/ 

X' 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He/ 

He' 

x/ 

X  / 

k' 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

*  ' 

*/ 

*/ 

He/ 

*/ 

*/ 

*/ 

*•/ 

*/ 

*/ 

*/ 

*  / 

*/ 

*/ 

*/ 

*/ 

*/ 

*/ 

*/ 

*/ 

He/ 

H=/ 

H=/ 

He/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X  ' 

x/ 

x/ 

x/ 

X* ' 

He/ 

He/ 

He' 

x/ 

x/ 

sfc  /  sfc  / 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

*  ' 

H=/ 

He' 

He  ' 

X/ 

X  / 

X  ' 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

H=/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

X/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He/ 

He/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

*/ 

He/ 

He/ 

He/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

H=/ 

He/ 

H=/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

X  / 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X' 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

He/ 

He/ 

He/ 

He/ 

x/ 

x/ 

x/  IX/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

*/ 

He/ 

x/ 

x/ 

X/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

*/ 

He/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X' 

x/ 

He/ 

x/ 

x/ 

x/ 

X/ 

He/ 

He/ 

He/ 

He/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

He/ 

He/ 

H=/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

He/ 

He/ 

He/ 

x/ 

X/ 

X' 

x/ 

x/ 

x/ 

x/ 

x  / 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

He/ 

H=/ 

He' 

H=/ 

x/ 

x/ 

x/ 

X/ 

X/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

X/ 

X/ 

x/ 

He/ 

He/ 

He/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

X/ 

He/ 

He/ 

He/ 

He' 

X' 

x/ 

X/ 

X' 

x/ 

x/ 

x/ 

X/ 

x/ 

X/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

H=/ 

He/ 

He/ 

He/ 

x  / 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X  / 

x/ 

X  / 

X' 

X' 

X' 

X/ 

X' 

He/ 

He/ 

He/ 

He/ 

X' 

x/ 

X/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X  / 

OHe 

OHe 

ox: 

OHe 

o  x 

o  x 

o  x 

ox 

O  : 

oh: 

0  He 

OHe 

oh: 

ox 

Oik 

oh: 

oh: 

oh: 

o  x 

oh: 

OHe 

°Xe 

Oik 

OHe 

ox 

ox 

ox 

°x 

ox 

oh: 

oh: 

oh: 

ox 

ox 

OHe 

oh: 

OHe 

OHe 

ox 

OHe 

one 

Oik 

one 

Oik 

ox 

ox 

ox 

ox 

ox 

OHe 

ox 

OHe 

OHe 

ox 

oh: 

Oik 

oh: 

oh: 

ox 

oh: 

ox: 

Oik 

ox: 

OHe 

ox 

ox 

ox 

ox 

ox 

Oik 

oh: 

oh: 

0* 

ox 

oh: 

one 

Oik 

Oik 

ox 

°He 

ox: 

OHe 

ox: 

Oik 

ox 

ox 

ox 

°x 

ox 

OHe 

OHe 

OHe 

Oik 

ox 

ox 

OHe 

ox 

Oik 

ox 

oh: 

OHe 

OHe 

ox: 

ox: 

ox 

ox 

ox 

°x 

ox 

oh: 

Oik 

OHe 

OHe 

ox 

Oik 

Oik 

OHe 

Oik 

ox 

OHe 

ox: 

Oik 

Oik 

ox: 

O* 

ox 

ox  °X 

ox 

OHe 

°x 

OHe 

Oik 

ox 

OHe 

one 

Oik 

Oik 

ox 

oh: 

ox: 

ox: 

ox: 

OHe 

ox 

ox 

Osfc 

ox 

ox 

Oik 

OHe 

Oik 

Oik 

ox 

OHe 

.oh: 

OHe 

OHe 

ox 

oh: 

one 

ox: 

ox: 

0* 

ox 

ox 

Osfc 

ox 

ox 

oh: 

oh: 

o* 

oh: 

ox 

Oik 

one 

°He 

OHe 

ox 

oik 

ox: 

Oik 

ox: 

Oik 

ox 

ox 

Osfc 

ox 

ox 

OHe 

OHe 

Oik 

Oik 

ox 

one 

OX 

oh< 

OH: 

ox 

one 

A  MODEL  TEST  PLAT. 


For  the  field  selection  of— 

High-producing  seed  for  testing,  see  top  of  page  2 
Substandard  seed,  see  bottom  of  page  3. 
Standard  seed,  see  page  4. 


o* 

Osfc 

Osfc 

Osfc 

Osfc 

Osfc 

Osfc 

Osfc 

Osjc 

Osfc 

Osfc 

Osfc 

Osfc 

Osf; 

Osfc 

Osfc 

Osjc 

Osfc 

Osfc 

Osfc 

Osfc 

Osfc 

Osfc 

ox 

Osfc 

Osfc 

Osfc 

ox 

Osfc 

Osfc 

Osfc 

Osfc 

Osfc 

Osfc 

Osfc 

ox 

Osfc 

Osfc 

Osfc 

Osfc 

x/ 

x/ 

x/ 

x/ 

*/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

sfc/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

*  / 

x/ 

x/ 

x/ 

X/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

sfc/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

sfc/ 

x/ 

x/ 

x/ 

x/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

x/ 

sfc/ 

x/ 

x/ 

He/ 

x/ 

x/ 

x/ 

He/ 

x/ 

x/ 

x/ 

He/ 

x/ 

X/ 

x/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

s.  / 

x/ 

x/ 

x/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

sfc/ 

He/ 

x/ 

x/ 

x/ 

x/ 

sfc/ 

sfc/ 

x/ 

He/ 

x/ 

sfc  / 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

X/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

sfc  / 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

sfc/ 

x/ 

x/ 

x/ 

x/ 

x/ 

*  / 

X/ 

sfc/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

He/ 

x/ 

X/ 

x/ 

X/ 

x/ 

x/ 

x/ 

He/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

sfc/ 

x/ 

X' 

X' 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

sfc/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

*/ 

x/ 

x/ 

x/ 

sfc/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

*/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

sjc/ 

x/ 

x/ 

x/ 

x/ 

sfc  / 

x/ 

x/ 

x/ 

x/ 

x/ 

*/ 

*/ 

*/ 

*/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

X/ 

sjc/ 

x/ 

Sfe  / 

x/ 

x/ 

x/ 

x/ 

ox 

ox 

o  x 

ox 

ox 

ox 

ox 

ox 

ox 

ox 

ox 

ox 

ox 

ox 

ox 

°x 

ox 

ox 

ox 

ox 

°x 

ox 

ox 

Osfe 

ox 

ox 

ox 

ox 

°x 

ox 

ox 

ox 

ox 

ox 

ox 

ox 

ox 

ox 

ox 

°x 

o* 

o* 

o* 

o* 

Osf: 

0* 

o* 

o* 

o* 

Osf: 

*/ 

*/ 

*/ 

*/ 

*/ 

sfc/ 

X/ 

X/ 

*/ 

X/ 

X/ 

X/ 

X/ 

X/ 

X/ 

X/ 

X/ 

X/ 

sfc/ 

X/ 
He/ 
X/ 
X/ 
X/ 
X/ 
X/ 
sfc  / 
sfc/ 
X/ 
X  / 

sfc  ' 
sfc/ 
X/ 
sfc/ 
sfc/ 
*/ 
X/ 
sfc  / 
sfc/ 
X/ 
sf.  / 
sf:/ 
sf:/ 
*/ 
sfc/ 
X/ 
sfc/ 
sfc/ 
sfc/ 
sfc/ 
sfc/ 
4=/ 
sfc/ 
X/ 
X/ 
sfc/ 
sfc/ 
X/ 
Sfc/ 
Sf!/ 
sfc/ 
sfc/ 
sfc/ 
sfc/ 

sfc/ 

sfc/ 

sfc/ 

sfc/ 

Sfc/ 

*/ 

Sfc/ 

sfc/ 

sfc/ 

sfc/ 

Sfc/ 

sfc/ 

X/ 

*  / 
Sfc/ 
*/ 
*/ 
sfc/ 
sfc/ 

sfc/ 
*/ 
sfc/ 
sfc/ 
sf:/ 
Sf:  / 
sf:/ 

H:/ 
He/ 
sfc/ 
Sfc  / 
*/ 
sf:/ 
He/ 
He/ 
He/ 
sfc/ 
O  sfc 
Osf: 
Osf: 
Osfc 
Osf: 
Osfc 
Os|c 
Osfc 
Osfc 
Osf: 


Osf: 

Osf: 

Osfc 

Osf: 

Osfc 

Osfc 

Osfc 

Osf: 

Osfc 

Osfc 

sf:/ 

He/ 

He/ 

He/ 

He/ 

Sfc/ 
*/ 
He/ 
*/ 
He/ 
He/ 
He/ 
H:/ 
sf:  / 

sfc/ 

Sf!/ 

He/ 

He/ 

H:/ 

He/ 

sf:/ 

He/ 

sfc/ 

He/ 

sfc/ 

He/ 
He/ 
He/ 
He/ 
He/ 
He' 
He  / 
He/ 
He/ 
He/ 
He/ 
He/ 

sfc/ 

H:/ 

He/ 

He/ 

*/ 

He/ 

He/ 

He/ 

sf:/ 

He/ 

He/ 

He/ 

H=/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

*/ 

sf:/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

sfc/ 

He/ 

*/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

*/ 

He/ 

H=/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

Sf!/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

He/ 

*/ 

OH: 

O* 

Osfc 

OH: 

Osf: 

Osfc 

Osfc 

Osf: 

Osfc 

Osfe 


ox 

ox 

ox 

OHe 

ox 

ox 

ox 

OHe 

ox 

ox 

ox 

oh: 

ox 

ox 

ox 

OHe 

ox 

ox 

ox 

oh: 

ox 

ox 

ox 

Oik 

ox 

ox 

ox 

oh: 

ox 

ox 

ox 

oh: 

ox 

ox 

ox 

OHe 

ox 

ox 

ox 

Oik 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X' 

x/ 

X/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

X' 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

X/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

X' 

X/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x  / 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

Uj  / 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x  / 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

X/ 

X/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

*/ 

*  / 

*/ 

*/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

*/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

X/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

x/ 

ox 

ox 

oh: 

OHe 

ox 

ox 

Oik 

OHe 

°x 

ox 

OHe 

°x 

ox 

ox 

oh: 

OHe 

ox 

ox 

one 

OHe 

ox 

ox 

°He 

OHe 

ox 

ox 

oh: 

oh: 

ox 

ox 

OHe 

OH: 

ox 

°x 

OHe 

OHe 

ox 

ox 

OHe 

OHe 

/ 

St.—  standard  seed. 

a,  b,  c,  etc.= substandard  seed. 

St. -a= standard  seed  first  member  of  hill;  substandard  (a),  second  me: 
a-l= substandard  seed  (a)  first  member  of  hills  in  row  No.  1;  tested 
°=  standard  plant. 

*=  substandard  plant. 

'= plant  being  tested. 

83723—10  ( To  face  page  3. ) 


DIRECTIONS  TO  COOPERATIVE  CORN  BREEDERS. 


3 


THE  TEST  PLAT. 

The  test  plat  has  for  its  object  the  accurate  comparison  of  the  pro¬ 
ductive  power  of  different  ears  of  corn. 

No  seed  is  saved  from  this  plat.  Hence  it  may  be  located  without 
reference  to  other  corn. 

It  should  be  located  on  land  as  nearly  uniform  throughout  as  is 
possible  to  secure.  The  chances  for  uniform  results  may  be  greatly 
increased  by  unusually  deep  and  thorough  preparation  of  the  land. 

The  plat  should  grow  one  row  from  the  seed  of  each  ear  tested, 
and  the  ear  and  its  row  should  be  given  the  same  number,  which 
should  be  carefully  recorded  and  preserved  for  future  reference. 

Each  ear  should  be  represented  by  50  plants  in  as  many  hills. 

One  plant  from  a  substandard  ear  (described  below)  should  be 
grown  in  each  hill  with  a  plant  from  an  ear  to  be  tested. 

The  hills  of  corn  should  be  planted  by  hand  and  in  a  definite  man¬ 
ner  with  two  plants  in  a  hill,  one- a  substandard  and  the  other  a  plant 
from  an  ear  being  tested.  (See  model  test  plat,  fig.  1.) 

For  the  sake  of  general  uniformity  the  first  plant  in  the  hill,  that 
is,  the  plant  nearest  the  row  ends  at  which  the  work  will  naturally 
begin,  should  always  be  from  the  substandard  seed,  and  the  plant 
from  seed  to  be  tested  should  always  be  second  in  the  hill  and  from 
^  6  to  8  inches  from  the  substandard. 

SUBSTANDARDS. 

A  substandard  is  seed  taken  from  a  single  plant.  It  may  come 
from  one  or  more  (in  the  case  of  prolific  corn)  ears.  Unusual  care 
should  be  taken  to  discard  any  kernels  of  doubtful  vitality.  Each 
substandard  should  be  planted  in  ten  different  rows  with  ears  to  be 
tested.  Allowance  should  also  be  made  for  the  planting  of  two  other 
rows  in  connection  with  a  standard,  as  will  be  explained  later.  A 
letter  ( a ,  6,  c ,  etc.)  must  be  given  each  substandard  and  its  exact 
location  in  the  test  plat  accurately  recorded. 

The  substandards  have  for  their  object  the  correction  of  differences 
in  the  yields  of  the  rows  due  to  soil  variation,  so  that  the  variations 
in  the  producing  power  of  the  ears  tested  may  be  distinguished. 

The  substandards  in  connection  with  standards,  if  properly 
selected,  may  also  serve  as  a  means  of  determining  the  progress  of  the 
work.  (See  “  Total  worth  of  season’s  selections,”  page  7.) 

SEED  USED  FOR  SUBSTANDARDS. 

The  breeder  should  choose  his  substandard  and  standard  seed  so 
that  it  will  represent  the  unselected  foundation  seed  or  such  other 
seed  of  the  community  as  he  would  otherwise  have  to  use. 


UNIVERSITY  • t 
IU.INQIS  LIBRARY 


4  DIRECTIONS  TO  COOPERATIVE  CORN  BREEDERS.  % 

This  seed  should  be  taken  from  stalks  favored  by  unusual  space. 
The  occasional  isolated  stalk  in  a  poor  stand  should  be  the  ideal. 

This  method  of  selecting  in  the  field  will  prevent  the  voluntary  or 
involuntary  choosing  for  high  or  low  yielders  and  at  the  same  time 
should  give  individuals  with  the  maximum  number  of  kernels. 

STANDARDS. 

In  order  that  all  the  tested  selections  may  be  compared  with  a  sin¬ 
gle  standard,  and  hence  with  each  other,  all  of  the  substandards 
should  be  compared  with  another  selection  called  the  standard.  The 
substandards  in  this  planting  are  the  second  members  of  the  hills, 
and  the  standard  is  the  first  member.  Two  plantings  of  this  sort 
should  be  made — preferably  one  on  either  end  of  the  plat.  In  case 
one  of  these  tests  should  be  destroyed  or  otherwise  made  unreliable 
the  key  to  the  season’s  work  will  still  not  have  been  lost.  In  case  both 
tests  are  good  the  average  results  should  be  used. 

The  standard  seed  is  selected  in  the  same  way  as  that  for  the  sub¬ 
standards,  but  should  be  sufficient  (not  less  than  1,000  good  kernels®) 
for  planting  in  twice  as  many  rows. 

PREPARATION  FOR  PLANTING. 

Preparing  seed. — Each  ear  should  be  given  a  number.  The  num¬ 
bers  should  be  written  on  pieces  of  cardboard  or  very  tough  paper, 
about  one-half  inch  square.  A  six-penny  wire  nail,  should  then  be 
forced  through  the  label  into  the  butt  of  the  ear  so  that  there  will  be 
no  danger  of  the  label  becoming  separated  from  the  ear.  Where  there 
have  been  two  or  more  ears  saved  from  the  same  stalk  they  should  be 
given  the  same  number.  In  this  case  it  is  well  to  shell  all  the  seed 
together  and  put  it  in  a  cloth  bag. 

Sufficient  seed  should  then  be  taken  from  each  selection  to  plant  the 
required  number  of  hills  in  its  row.  It  should  be  put  in  a  small 
paper  bag  bearing  the  selection  number.  The  kernels  should  all  be 
given  individual  inspection  to  be  sure  that  none  are  in  any  way  un¬ 
desirable. 

Remnants. — The  remnants  of  the  ears,  after  taking  enough  kernels 
for  planting,  should  be  returned  to  storage  and  carefully  preserved. 

Preparation  of  the  land. — The  land  should  have  received  all  neces¬ 
sary  preparation  previous  to  the  time  of  planting,  and  if  the  method 
of  preparation  does  not  indicate  the  location  of  the  rows  they  should 
be  indicated  by  some  form  of  a  marker  or  by  a  cord  at  the  time  of 
planting. 

°  It  is  desirable,  for  possible  future  plantings,  and  particularly  for  the  stand¬ 
ard  selection,  to  have  as  much  seed  from  any  one  plant  as  it  is  possible  to  ob¬ 
tain;  hence,  in  prolific  corn  more  than  one  ear  should  be  saved  from  a  single 
stalk  and  the  total  quantity  regarded  as  one  ear. 


DIRECTIONS  TO  COOPERATIVE  CORN  BREEDERS.  5 

4 

A  furrow  may  be  opened  for  the  reception  of  the  seed,  but  in 
that  case  it  should  not  be  opened  long  enough  ahead  to  permit  it  to 
dry  out  before  the  seed  can  be  planted.  If  it  is  allowed  to  dry  out, 
the  stand  may  be  imperfect  and  will  be  irregular  in  coming  up. 

Distributing  the  bags  of  seed. — Before  beginning  to  plant  it  is 
well  to  distribute  the  bags  of  seed  according  to  their  number  upon 
the  proper  rows. 

PLANTING. 

Two  persons  should  drop  the  seed  of  each  row,  one  always  dropping 
the  first  member  of  the  hill  and  the  other  always  dropping  the  second 
member  of  the  hill.  Only  one  kernel  should  be  dropped  in  the  hill 
by  each.  Both  kernels  should  be  dropped  at  the  same  time  and 
covered  by  a  third  person. 

Hand  planters. — There  are  small  planters  on  the  market  that  can 
be  carried  and  operated  with  one  hand,  and  where  their  hoppers  are 
replaced  by  an  open  funnel-shaped  tube — easily  made  of  tin  by  any¬ 
one — they  may  be  used  by  the  droppers  so  as  to  eliminate  the  man 
with  the  hoe. 

These  planters  will  give  a  more  uniform  depth  of  planting  than 
where  a  hoe  is  used,  and  there  need  be  no  danger  of  a  dry  hill  as 
they  make  their  own  hole  and  cover  the  seed. 

The  soil  over  each  kernel  should  be  given  pressure  from  the  foot 
before  leaving  it;  dry  or  open  soil  should  be  given  more  pressure 
than  moist  soil  that  is  liable  to  bake. 

HARVESTING. 

Corn  must  be- dry. — All  rows  of  a  test  plat,  and  sometimes  all 
plants  in  a  row,  may  not  ripen  and  dry  out  together.  Particularly 
will  the  large-cobbed  thick  ears  be  slow  in  becoming  well  cured. 
For  this  reason  sufficient  time  should  be  allowed  for  even  the  latest 
and  largest  ears  to  become  air  dry;  otherwise  extra  weight  due  to 
moisture  may,  in  calculating  results,  be  mistaken  for  weight  of  grain, 
and  an  individual  be  retained  for  future  planting  that  may  be  par¬ 
ticularly  undesirable  because  of  its  lateness  or  tardiness  in  curing. 

RECORDS  AND  WEIGHINGS. 

The  following  blank  form  heading  indicates  the  notes  and  the  man¬ 
ner  of  recording  them  that  are  essential  in  getting  a  comparison  of 
the  productive  power  of  selections  in  a  test . 


6 


DIRECTIONS  TO  COOPERATIVE  CORN  BREEDERS. 


Record  Sheet  for  Test  Plat. 

Grower _  Location _  Season  191- 


Substandard  letter. 

Row 

No. 

Number 
of  perfect 
hills. 

Total  yield  of 
ears  from — 

Yield  per  stalk  of— 

True  rela¬ 
tive  values 
of  the  se¬ 
lections 
tested. 

Sub¬ 

standard. 

Tested 

plants. 

Sub¬ 

standard. 

Tested 

plants. 

Calcu¬ 

lated 

standard. 

Perfect  hills. — In  securing  comparisons  only  such  hills  as  contain 
one  productive  stalk  from  substandard  seed  and  one  productive  stalk 
from  the  seed  being  tested  should  be  considered.  Before  husking  the 
com  the  number  of  these  perfect  hills  in  a  row  must  be  recorded. 

Yields  from  rows. — Two  men  should  be  equipped  with  bags  slung 
from  their  shoulders.  One  should  gather  and  husk  only  the  com 
from  the  first  plant  in  each  hill  (substandard)  and  the  other  should 
gather  and  husk  only  the  com  from  the  second  plant  in  each  hill 
(tested  plants),  and  the  work  on  each  hill  should  be  done  simul¬ 
taneously.  The  corn  thus  gathered  should  be  weighed  separately 
and  the  weights  recorded  with  the  proper  row  number. 

Yield  yer  stalk. — The  yield  per  stalk  should  then  be  determined 
for  both  the  substandards  and  the  tested  plants. 

Calculated  standard. — The  calculated  standard  for  any  row  repre¬ 
sents  the  yield  per  stalk  of  the  standard  ear  had  it  been  planted  in 
that  row. 

To  obtain  the  calculated  standard,  suppose,  for  example,  that  the 
standard  had  produced  0.0625  of  a  pound  (1  ounce)  per  stalk  more 
than  the  substandard  a\  this  difference  would  then  be  added  to  the 
stalk  yield  of  that  substandard  and  the  result  would  be  recorded 
under  the  heading  “  Calculated  standard.”  If  the  standard  yield 
had  been  0.0625  of  a  pound  less  than  that  substandard  the  difference 
would  have  been  taken  away  from  that  substandard’s  yield  and  the 
result  placed  under  the  same  heading. 

The  yield  of  each  substandard  is  thus  changed  according  as  it 
varies  from  that  of  the  standard,  so  that  the  new  figures  represent 
the  standard  ear  in  every  case,  and  thus  all  of  the  tested  selections 
may  be  compared  with  the  same  unit  of  production. 

True  relative  value  of  the  selections  tested. — Under  the  last  heading 
of  the  record  sheet  one  simply  fills  in  the  differences  between  the  tested 
plants  and  the  calculated  standard.  Where  the  tested  plants  have 
yielded  more  than  the  calculated  standard  the  difference  is  written 
with  a  plus  sign  before  it,  and  when  less,  with  a  minus  sign  before  it. 
These  differences  represent  the  true  relative  values  of  the  selections 


DIRECTIONS  TO  COOPERATIVE  CORN  BREEDERS.  7 

tested,  and  the  largest  differences  with  the  plus  signs  before  them 
indicate  the  selections  that  should  be  retained  and  propagated. 

REMNANTS  TO  RETAIN  FOR  FURTHER  TEST. 

When  the  comparative  values  of  the  selections  have  been  deter¬ 
mined,  as  described,  all  of  those  remnants  should  be  discarded  whose 
low  productiveness  bars  them  from  being  classed  with  the  20  per 
cent  that  gave  the  highest  yields.  The  high-yielding  20  per  cent 
should  still  be  retained  for  another  year’s  test. 

TOTAL  WORTH  OF  SEASON’S  SELECTIONS. 

The  total  worth  of  the  season’s  selections  should  be  determined  by 
subtracting  the  average  stalk  yield  of  the  substandards  and  the  stand¬ 
ard  from  the  average  stalk  yield  of  all  the  selections  tested. 

SECOND  YEAR’S  WORK. 

TEST  PLAT. 

Contents. — The  second  year’s  work  should  consist  of  a  test  similar 
to  that  of  the  first  year.  It  should  contain  20  per  cent  of  the  previous 
year’s  selections  and  enough  new  selections  to  complete  the  test’s 
required  number. 

Numbering  the  selections. — The  new  selections  should  be  num¬ 
bered  simply  1,  2,  3,  etc.,  as  in  the  past  season,  and  should  be  planted 
in  rows  of  the  same  number.  The  previous  test-plat  selections  should 
be  given  the  number  of  the  row  in  which  they  are  now  planted,  but 
this  number  should  also  be  accompanied  by  the  old  row  number  .writ¬ 
ten  after  it.  Suppose  the  first  old  selection  this  year  is  planted  in 
row  1,  and  last  year  it  was  planted  in  row  33,  its  complete  number 
this  year  will  be  1 — 33.  These  old  selections  should  be  so  arranged 
that  one  will  occur  in  each  of  the  first  two  rows  of  each  substandard. 

BREEDING  PLAT. 

Object. — The  breeding  plat  is  for  the  crossing  and  propagation  of 
the  high-yielding  strains  found  in  the  previous  year’s  test  plat. 

Isolation. — This  plat  should  be  so  isolated  that  the  pollen  from  other 
corn  can  not  be  blown  upon  it. 

Land. — The  land  does  not  necessarily  have  to  be  uniform,  but  it 
should  be  of  average  fertility  and  well  cultivated,  so  that  as  much  seed 
can  be  grown  as  is  possible. 

Seed  used. — The  breeding  plat  should  be  planted  with  the  remnant 
seed  of  the  four  highest  producers  of  the  previous  year’s  test.  In 
making  this  planting  all  of  each  remnant  should  be  used,  except  that 
which  is  required  for  planting  a  row  in  the  test  plat. 


8 


DIRECTIONS  TO  COOPERATIVE  CORN  BREEDERS. 


Numbering. — In  the  breeding  plat  the  selections  should  be  desig¬ 
nated  by  a  Roman  numeral  following  the  previous  year’s  test  plat 
number.  (See  “  Plan  for  crossing  remnants,”  below.) 

Planting. — The  four  selections  should  be  planted  in  separate  rows, 
but  the  first  choice  must  be  alternated  with  the  rows  of  the  other 
three  selections  so  that  it  may  shed  its  pollen  upon  all. 

Preventing  inbreeding. — The  following  table  indicates  a  plan  for 
planting  and  detasseling  the  breeding  plat  so  as  to  secure  cross¬ 
pollination  : 

Plan  for  crossing  remnants. 

21 — II.  Second  choice _ Detasseled. 

33 — 1.  First  choice _ Not  detasseled. 

42 — III.  Third  choice _ Detasseled. 

33 — I.  First  choice _ „ _ Not  detasseled. 

7 — IV.  Fourth  choice _ Detasseled. 

Pate  of  seeding. — It  should  be  observed  that  if  the  remnants  are 
all  about  the  same  size  the  first-choice  seed  will  have  to  be  planted  just 
half  as  thick  as  that  of  the  other  selections,  because  it  is  planted  upon 
just  twice  as  much  row. 

Duplicating . — In  case  it  is  not  convenient  to  plant  all  seed  in  a 
single  long  set  of  rows,  the  set  may  be  shortened  and  then  duplicated. 
In  duplicating,  however,  care  should  be  taken  to  maintain  the  same 
relation  between  the  different  selections,  and  the  same  should  all  be 
recorded  so  that  no  mistake  will  be  made  in  detasseling  and  harvesting. 
Better  pollination  will  probably  be  secured  by  thus  duplicating 
the  set. 

Detasseling. — When  this  corn  begins  tasseling  it  should  be  visited 
daily,  and  any  tassels  on  the  rows  from  the  second,  third,  and  fourth 
choice  selections  should  be  removed  before  they  have  begun  to  scatter 
pollen. 

Caution. — The  tassels  should  be  pulled  out  carefully,  so  as  not  to 
break  the  stalks  or  injure  the  leaves  more  than  is  necessary. 

HARVESTING  TEST  PLAT. 

The  test  plat  should  be  harvested  and  the  results  recorded  in  the 
same  way  as  in  the  past  season. 

HARVESTING  BREEDING  PLAT. 

S elections  for  third  yeaPs  test  plat. — Enough  selections  should  be 
made  from  each  of  the  four  strains  represented  in  the  breeding  plat 
to  plant  10  per  cent  of  the  next  season’s  test  plat ;  that  is,  if  the  test 
plat  contains  50  selections,  then  5  should  be  made  from  each  strain  in 
the  breeding  plat,  but  if  the  plat  contains  100  selections,  then  10 
selections  should  be  made  from  each  of  the  breeding-plat  strains. 


DIRECTIONS  TO  COOPERATIVE  CORN  BREEDERS. 


9 


Selections  for  general  -planting . — All  of  the  remaining  corn  from 
the  detasseled  rows  that  is  suitable  for  seed  should  be  gathered  and 
saved  for  planting  an  improved  general  field  the  following  season. 
No  seed  from  the  rows  not  detasseled  should  be  used  for  this  field. 

If  the  work  up  to  this  time  has  been  properly  done  there  should  be 
sufficient  high-producing  seed  to  plant  at  least  10  acres.  Another 
year  this  can  be  multiplied  sufficiently  to  furnish  seed  for  even  the 
largest  farm  or  plantation. 


MIX  THE  SEED  FOR  GENERAL  PLANTING. 

Before  planting  the  seed  saved  from  the  breeding  plat  for  general 
planting  it  should  be  thoroughly  mixed  together. 

TO  TEST  BREEDING-PLAT  SELECTIONS. 

To  test  the  breeding-plat  selections  the  following  season,  they 
should  be  so  planted  in  the  test  plat  that  each  strain  will  be  repre¬ 
sented  once  with  each  substandard. 


PLAN  FOR  A  THIRD  YEAR’S  TEST  PLAT. 


The  following  table  indicates  a  plan  for  planting  selections  with 
each  substandard  in  the  third  year’s  test  plat : 


Plan  for  planting  a  substandard  section  in  the  third  year's  test  plat. 


[Substandard  a.]° 

1  (old  row  No.),  from  last  year’s  test  plat 

2  (old  row  No.),  from  last  year’s  test  plat. 

3 —  I,  from  last  year’s  breeding  plat _ 

4 —  II,  from  last  year’s  breeding  plat _ 

5 —  III,  from  last  year’s  breeding  plat _ 

6 —  IV,  from  last  year’s  breeding  plat _ 

7,  untried  selections _ 

8,  untried  selections _ 

9,  untried  selections _ 

10,  untried  selections _ 


Per  cent. 
.  20 

■ 

►  40 


40 


CONTINUOUS  WORK. 

TEST  PLAT  A  COURT. 

From  year  to  year  the  test  plat  should  be  made  a  court  in  which 
the  best  corn  from  the  unselected  fields,  the  previous  test  plat,  the 
breeding  plat,  and  the  fields  of  improved  seed  grown  from  ears 
that  have  already  passed  the  test  must  meet  yearly  and  stand  solely 
upon  their  merits. 

a  The  next  10  rows  are  planted  in  the  same  order  with  substandard  b,  and  so 
on  for  each  substandard. 


10  DIRECTIONS  TO  COOPERATIVE  CORN  BREEDERS. 

HIGH  YIELDING  POWER  TRANSMITTED  BY  REMNANTS  ONLY. 

The  quality  of  productiveness  should  be  allowed  to  pass  on  into 
the  improved  field  only  by  means  of  remnants  of  the  highest  yielding 
ears. 

PRESENT  HIGH  PERFORMANCE  REQUIRED. 

No  matter  what  the  pedigree  may  show,  the  highest  record  of 
present  performance  should  be  required  of  each  ear  before  allowing 
its  progeny  to  enter  the  improved  general  field,  and  then  only  after 
precaution  is  taken  to  prevent  inbreeding  as  prescribed  under 
“  Breeding  plat.” 

ADOPTING  A  DIFFERENT  VARIETY. 

Any  selections  that  promise  better  yields  should  be  tested  in  the 
test  plat,  but  should  selections  from  a  distinctly  different  variety  be 
tested,  unusual  assurance  from  repeated  trial  should  be  obtained 
before  it  be  taken  up  and  the  old  strain  discarded. 

C.  H.  Kyle, 
Assistant  Physiologist. 

Approved : 

G.  H.  Powell, 

Acting  Chief  of  Bureau. 

March  10,  1910. 

O 


rflmrnLti  hinder 

'  Syracuse,  N.  Y. 
- Stockton,  Calif. 


